Punching-machine.



T. LUND.

PUNCHING MACHlNE.

APPLICATION FILED MAY16. 1914.

l, l 61,059. Patented Nov. 23, 1915.

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Encinas Eutin, or'nEvEELniiasseonusnrrs,asscno To UNTED si-oE n MACHINERY COMPANY, or ParEesoN, NEW JEEsEY, A conroaa'ricm` oE i NEW JERSY -rienosefl y,

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Patented Nov. 23,- igia Application filed May 16, 1914. 'Serial No. 839,020.`

To all whom z'tmag/ concern.' Be it knownthat l, THOMAS LND, a citi- Zen of the United States', residing at Beverly, in the county ofyEsseX and State' 4of Massachusetts, have invented certain 1m provenients in Punching-Machines, of which the followingdescription, in connection with the accompanying drawings, is 'a specification, like reference characters on the. drawings indicating like parts in `the 'several figures. i i

This inventionrelates rto punching yma` chines and is illustrated in connection with a machine of the type shown infUnited' Stat-es y,783,403 yfor punching or perforating the toe tip of a shoe. Yihen, as in machines of this type, hollow punches are used it is necessary that provision be made for permitting the escape of thepieces of waste material which are forced into and through said punches. At the same time the supporting hase upon which the punch plate holder rests must be substantiallyiigid so that 'no springing ofthe plate and holder will take place. lf punch plateshaving the punches arranged in a single runiform pattern were always used, correspondingly shaped passage through the supporting'base'V would be sufficient; but the arrangement of y the punches differs greatly with different plates so that the sizeof the passage in the supporting hase necessary to take care of all arrangements would he suflicient to weaken said supporting base materially.

One feature of the present invention con sists of a supporting base in the form of a grating the bars of which are comparatively thin at their tops. These bars are of a depth sulicient to afford the necessary strength, while at the same time the spaces between them permit the escape of the pieces ofwaste material which are forced through the hollow punches. rihis and other features of the invention, including certain details of construction and combinations of parts will he described inconnection with an illustrative machine and pointed out in the appended claims.

Referring now to the accompanying drawings, Figure 1 isa perspective of one end of a punching machine in which the present,

machineis a shaft 3 fast to which is a sleeve having formed thereon two eccentrics one of which is shown at 5, said shaft being driven from a loose pulley 7 through a clutch of any suitable type which may be thrown into operation hy a downward pull upon the treadle rod 9. Theeccentrics T5 are connected by means of rods l1y with aplunger 13 having a flat under surface. The punch plate holder 15, which ismade in two parts `fastened together in any suitable manner, carries a series/of hollow punches 17 and a yielding stripperwplate 19. In the operation of the machine a toe tip is placed on the stripper plate 19 with its inner edge against the yield-r ing gage 20, and the treadle rod 9 is then depressed. The'plunger 18 thereupon descends Y forcingfthe hollow punches 17 through the stock and moving the stripper plate 19 downwardly.` The clutch is of the one revolution type," and when the plunger 13 rises and comes to Arest in the position shown lthe yielding plate 19 has stripped the toe tip from the punches so that it may removed. i

The small disks of material which are removed `by 'the hollow punches and are forced into and through said punches become tightly packed together during the operation of the machine, and these cylindrical accumulations are commonly known as pills After the punches have become filled with the punchings these pills are ejected from the lower ends of said punches as new punchings are produced. It is essential that provision be made for the escape of these pills. since otherwise the punches are liable to be broken. If the same pattern or arrangement of punches were always used, this would be a simple matter, but the pattern of the punches, as well as the location of the pattern, with respect to the edge of the punch plate varies with different plates. The portion 21 of the base of the machine which supports the punch plate holder is accordingly made in the form lof a grating, the spaces between the bars being comparatively large so that with any given punch plate the pills will drop through the grating. In order, however, to provide for a-case in which one or more cylindrical pills should be forced directly against the top of one or more of the grate bars, said grateloars are tapered at their upper portions; and the openings 23 in the readily loe punch plate holder 22 are made of a diamev ter considerably greater than the diameter of the pills'which are formed. The probability is very great that with a givenipattern of punches no pills will strike squarely uponthe narrow top of a grate bar but if 'such a condition does occur the cylindrical pill will bei crumpled in the bore 23 so that the direction of its downward thrust will be changed and the pill will be forced between vthe -grate bars. This grating thus furnishes va rigid support for the punch plate holder so as to prevent any possibility of the springing of said holder and at the same time permits the escape of the'pieces of waste material. For convenience in the above description the hollowpunches have been described as cylindrical but it should be understood that the shape of theV punches is immaterial. i

Although the invention has been set forth in connection with a particular machine,it should be understood that the invention is notlimited in the scope of its application to the particular machineshown and described.

Having thus described my invention, what I claim and desire to secureb-y Letters Patent of the United States is :r

l. A machine of the class described having, in combination, a punch plate, hollow punches carried thereby, a holder for said plate, means for pressing against the punches pieces of material` whereby pills of waste material are forced down through said punches, and agrati'ngl for supporting said holder and permitting the escape of said pills.

2. A machine of the class described having, in combination, a punch plate, hollow punches carried thereby, a holder for said plate, 4means for pressing against the punches pieces of material whereby pills of fwaste material are ,forced through the punches, and a grating for supporting said holder and permitting the escape of said pills, the bars of said grating being tapered at their upper portions and said holder being provided with a passageway of larger cross-section than that of said pills.

3. In `a machine` of the class described having hollow k.punches and a punch holder, f i

a rsupport for the punch holder comprising a grating the bars of which are tapered at their upper portions to permit the escape of the waste material which is forced through the hollowy punches.

l.hln va machine of theV class describedV having a punch holder, a support for the punch holder comprising a rigid grating the upper portions of the bars of which are of small cross-section.

In testimony whereof I have signed my name to this specification int-he presence of two subscribing witnesses.

`THOMAS LUND.

Witnesses:

CHESTER E. ROGERS, y LAURA M'. GOODRIDGE.

Copies of this patent may be obtained forA five cents each, by addressing the Commissioner of Patents, Washington, I). C. 

